$EF7E/61310: Set Up To Receive
Jump from $EF92, $EFD8:
EF7E: A9 90 LDA #$90
EF80: 8D 0D DD STA $DD0D ; CIA2: Interrupt (NMI) Control Register
EF83: 0D A1 02 ORA $02A1 ; RS232 Enables
EF86: 8D A1 02 STA $02A1 ; RS232 Enables
EF89: 85 A9 STA $A9 ; RS232 Flag: Start Bit check/Tape temporary
EF8B: A9 02 LDA #$02
EF8D: 4C 3B EF JMP $EF3B ; Disable Timer
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